872816655 has 16 divisors (see below), whose sum is σ = 1409560704. Its totient is φ = 461150880.

The previous prime is 872816653. The next prime is 872816663. The reversal of 872816655 is 556618278.

It is not a de Polignac number, because 872816655 - 2¹ = 872816653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872816653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 270301 + ... + 273510.

It is an arithmetic number, because the mean of its divisors is an integer number (88097544).

Almost surely, 2^872816655 is an apocalyptic number.

872816655 is a deficient number, since it is larger than the sum of its proper divisors (536744049).

872816655 is a wasteful number, since it uses less digits than its factorization.

872816655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543926.

The product of its digits is 806400, while the sum is 48.

The square root of 872816655 is about 29543.4705984250. The cubic root of 872816655 is about 955.6693880649.

The spelling of 872816655 in words is "eight hundred seventy-two million, eight hundred sixteen thousand, six hundred fifty-five".